provide knob for enabling optimizations

mozilla/mozilla.spec

@@ -37,9 +37,10 @@ Distribution: OpenPKG [EVAL]
 Group:        Web
 License:      MPL
 Version:      %{V_mozilla}
-Release:      20030723
+Release:      20030725
 
 #   package options
+%option       with_optimize   no
 %option       with_mailnews   no
 %option       with_composer   no
 
@@ -135,6 +136,11 @@ AutoReqProv:  no
         --enable-chrome-format=jar \
         --enable-static \
         --enable-strip \
+%if "%{with_optimize}" == "yes"
+        --enable-optimize="-O2" \
+%else
+        --disable-optimize \
+%endif
 %if "%{with_mailnews}" == "yes"
         --enable-mailnews \
 %else
@@ -159,10 +165,9 @@ AutoReqProv:  no
         --disable-md \
         --disable-cpp-exceptions \
         --disable-cpp-rtti \
-        --disable-optimize \
         --disable-xterm-updates \
-        --with-pthreads \
-        --disable-elf-dynstr-gc
+        --disable-elf-dynstr-gc \
+        --with-pthreads
 
     #   build program
     %{l_make} %{l_mflags}